Slasher Axles come with a 1 year limited warranty. We will replace a broken or defective axle 1 time per part number within the 1 year warranty period. These are fully assembled axles equipped with outboard and inboard joints installed on a 4340 chrome-moly steel axle bar. These are designed to last and withstand rough and intense terrain. All internal precision ground components are assembled using high temperature, high load bearing moly grease to ensure there is good internal lubrication. These are engineered to provide superior performance and the neoprene boots that come on them are manufactured to provide extreme protection against ozone, which is the leading cause of boot failure.